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+/* interpolation/gsl_interp2d.h
+ *
+ * Copyright 2012 David Zaslavsky
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GSL_INTERP2D_H__
+#define __GSL_INTERP2D_H__
+
+#include <gsl/gsl_interp.h>
+
+#undef __BEGIN_DECLS
+#undef __END_DECLS
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS /* empty */
+# define __END_DECLS /* empty */
+#endif
+
+__BEGIN_DECLS
+
+typedef struct {
+ const char* name;
+ unsigned int min_size;
+ void * (*alloc)(size_t xsize, size_t ysize);
+ int (*init)(void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize);
+ int (*eval)(const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z);
+ int (*eval_deriv_x) (const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z_p);
+ int (*eval_deriv_y) (const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z_p);
+ int (*eval_deriv_xx) (const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z_pp);
+ int (*eval_deriv_xy) (const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z_pp);
+ int (*eval_deriv_yy) (const void *, const double xa[], const double ya[], const double za[], size_t xsize, size_t ysize, double x, double y, gsl_interp_accel*, gsl_interp_accel*, double* z_pp);
+ void (*free)(void *);
+} gsl_interp2d_type;
+
+typedef struct {
+ const gsl_interp2d_type * type; /* interpolation type */
+ double xmin; /* minimum value of x for which data have been provided */
+ double xmax; /* maximum value of x for which data have been provided */
+ double ymin; /* minimum value of y for which data have been provided */
+ double ymax; /* maximum value of y for which data have been provided */
+ size_t xsize; /* number of x values provided */
+ size_t ysize; /* number of y values provided */
+ void * state; /* internal state object specific to the interpolation type */
+} gsl_interp2d;
+
+/* available types */
+GSL_VAR const gsl_interp2d_type * gsl_interp2d_bilinear;
+GSL_VAR const gsl_interp2d_type * gsl_interp2d_bicubic;
+
+gsl_interp2d * gsl_interp2d_alloc(const gsl_interp2d_type * T, const size_t xsize,
+ const size_t ysize);
+
+const char * gsl_interp2d_name(const gsl_interp2d * interp);
+size_t gsl_interp2d_min_size(const gsl_interp2d * interp);
+size_t gsl_interp2d_type_min_size(const gsl_interp2d_type * T);
+int gsl_interp2d_set(const gsl_interp2d * interp, double zarr[],
+ const size_t i, const size_t j, const double z);
+double gsl_interp2d_get(const gsl_interp2d * interp, const double zarr[],
+ const size_t i, const size_t j);
+size_t gsl_interp2d_idx(const gsl_interp2d * interp,
+ const size_t i, const size_t j);
+int gsl_interp2d_init(gsl_interp2d * interp, const double xa[], const double ya[],
+ const double za[], const size_t xsize, const size_t ysize);
+void gsl_interp2d_free(gsl_interp2d * interp);
+
+double gsl_interp2d_eval(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[], const double x,
+ const double y, gsl_interp_accel * xa, gsl_interp_accel * ya);
+
+double gsl_interp2d_eval_extrap(const gsl_interp2d * interp,
+ const double xarr[], const double yarr[],
+ const double zarr[], const double x,
+ const double y, gsl_interp_accel * xa,
+ gsl_interp_accel * ya);
+
+int gsl_interp2d_eval_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y, gsl_interp_accel* xa,
+ gsl_interp_accel* ya, double * z);
+
+int gsl_interp2d_eval_e_extrap(const gsl_interp2d * interp,
+ const double xarr[],
+ const double yarr[],
+ const double zarr[],
+ const double x,
+ const double y,
+ gsl_interp_accel * xa,
+ gsl_interp_accel * ya,
+ double * z);
+
+double gsl_interp2d_eval_deriv_x(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y, gsl_interp_accel * xa,
+ gsl_interp_accel * ya);
+
+int gsl_interp2d_eval_deriv_x_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya, double * z);
+
+double gsl_interp2d_eval_deriv_y(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel* xa, gsl_interp_accel* ya);
+
+int gsl_interp2d_eval_deriv_y_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya, double * z);
+
+double gsl_interp2d_eval_deriv_xx(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya);
+
+int gsl_interp2d_eval_deriv_xx_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya, double * z);
+
+double gsl_interp2d_eval_deriv_yy(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya);
+
+int gsl_interp2d_eval_deriv_yy_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya, double * z);
+
+double gsl_interp2d_eval_deriv_xy(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya);
+
+int gsl_interp2d_eval_deriv_xy_e(const gsl_interp2d * interp, const double xarr[],
+ const double yarr[], const double zarr[],
+ const double x, const double y,
+ gsl_interp_accel * xa, gsl_interp_accel * ya, double * z);
+
+
+__END_DECLS
+
+#endif /* __GSL_INTERP2D_H__ */
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